Search for the Standard Model Higgs boson in association with top quarks and decaying to a pair of b quarks at sqrt(s) = 7 TeV with ATLAS

A search for a Higgs boson produced in association with a pair of top quarks and decaying into a pair of b quarks is presented [1]. The analysis uses 4.7 fb−1 of pp collisions collected in 2011 with the ATLAS detector. The search is focused on the semileptonic decay of the t¯t system and combines nine different topologies given by the jet and b-tagged jet multiplicities of the event. A kinematic reconstruction of the Higgs boson mass is performed in the signal enhanced region, which becomes the primary discriminant variable between signal and background. Background-dominated samples are exploited to constrain the leading systematic uncertainties affecting the background prediction. No significant excess of events above the background expectation is observed.